Java/C2/Arithmetic-Operations/English

Title of script: Arithmetic Operations in Java

Author: TalentSprint

Keywords: datatype, int, float, numerical data, arithmetic operations, operator precedence, video tutorial

Visual Cue	Narration
Slide 1 Welcome	Welcome to the spoken tutorial on Arithmetic Operations in Java.
Slide 2 Learning Outcomes	In this tutorial, you will learn about the various Arithmetic Operations namely Addition Subtraction Multiplication Division and How to use them.
Slide 3 Tools Used	For this tutorial we are using Ubuntu 11.10, JDK 1.6 and Eclipse 3.7.
Slide 4 Prerequisites	To follow this tutorial you must have eclipse installed in your system and you must know how to create, save and run a file in Eclipse. If not, for relevant tutorial please visit our website as shown.
Slide 5 Operators	Here is a list of operators and the mathematical operations they perform plus symbol for addition minus for subtraction asterisk for multiplication front slash for division We shall look at each of them in detail.
Minimize Slides and open Eclipse Eclipse should contain the following code public class ArithmeticOperations{ public static void main(String[] args){ } }	Here We have Eclipse IDE and the skeleton required for the rest of the code. We have created a class by name ArithmeticOperations and added the main method. Let us add some variables.
Type in main method int x = 5; int y = 10; int result;	int x = 5; 'int y = 10; print result x and y will be the operands and the result will store the output of operations.
Type in main method result = x + y; System.out.println(result);	Let us add them and print the result. Result= x+y; system. out. println 'in parantesis result
Save and Run.	'Save it with ControlS and contron F11 to Run
Point to output.	We see, that the output of addition is stored and the value has been printed
Change x = 5 to x = 75 and y = 10 to y = 15	Now Let us change the values . x=75,y = 15
Save and Run.	Save it Run
Point to output	we see the output has been changes accordingly
Change y = 15 to y = -25.	Now let us try negative values. 'y = -25.
Save and Run.	Save Run.
Point to output	we see that the output of 75 plus of -25 has been printed
Change y = -25 to y = 5 and x + y to x – y	Now let us try subtraction. 'y = 5 and change x+y to x-y
Save and Run.	Save it Run.
Point to output	we see that the output of 75-5 has been printed,
Change x – y to x * y	Now Let us try the multiplication. Change minus to asterisk
Save and Run.	Save Run.
Point to output	we see that by using asterisk we could multiply 75*5. .
Change x * y to x / y	Now let us try division Remove asteriskand type slash The front slash symbol is used to perform division.
Save and Run.	Save it Run.
Point to output	As we can see, the output is as expected.
Change y = 5 to y = 10	Now let us see what happens when the expected result is a decimal point number. Change 5 to 10 The result must be 7.5. So let us change the result to a float.
Save it Run. Point to output.	Note that although the expected result is 7.5, we get output as 7.0
Point to the operands.	This is because both the operands involved in the division are integers.
Change y = 10 to y = 10f	Let us change y to a float. y=10f
Save and Run. Point to output.	Save Run. Now we can see that the result is as expected. Keep in mind that when the expected result is a float, one of the operands must be a float to get the expected output.
Remove everything inside the main function, except the print line and add the following, before Int result = 8 + 4 – 2;	Now let us see what happens when there is more than one operator.Remove all the operands
Save and Run. Point to output	int result= 8+4-2. Save it run As we can see, the output is as expected.
Change 8 + 4 – 2 to 8 + 4 / 2 Save and Run. Point to output	Now Change minus to a s lash Now the output would be 6 if the addition is done before division. Or it would be 10 if division is done before addition. Let us Run and see the output. As we can see, the output is 10 and the division is done before addition. This is because the division operator has more precedence than the addition operator. In such situations, if we need to override the precedence, we use parentheses.
Change 8 + 4 / 2 to (8 + 4) / 2 Save and Run. Point to output	By adding parentheses, we instruct Java to do the addition before the division. Let us run the file now. As we can see, addition has been performed first and the output is 6 as expected. As a rule, keep in mind to use parentheses when the order of operations is not clear.
Minimize the Eclipse window and switch to slides. Slide 6 Summary	This brings us to the end of this tutorial. In this tutorial we have learnt How to perform basic mathematical operations in Java. About operator precedence, and, How to override it.
Slide 7Assignment	As an assignment for this tutorial Find out what is meant by the modulo operator and what it does.
Slide 8About the Spoken Tutorial Project Watch the video available at[1]http://spoken-tutorial.org/What_is_a_Spoken_Tutorial It summarizes the Spoken Tutorial project If you do not have good bandwidth, you can download and watch it	To know more about the Spoken Tutorial project, watch the video available at the following link, that summarizes the project.Alternatively, you can download and watch it.
Slide 9Spoken Tutorial WorkshopsThe Spoken Tutorial Project Team Conducts workshops using spoken tutorials Gives certificates for those who pass an online test For more details, please write to contact@spoken-tutorial.org	The Spoken Tutorial Project Team. Conducts workshops using spoken tutorials and gives certificates for those who pass an online test. For more details, please write to contact AT spoken HYPHEN tutorial DOT org.
Slide 10Acknowledgement Spoken Tutorial Project is a part of the Talk to a Teacher project It is supported by the National Mission on Education through ICT, MHRD, Government of India More information on this Mission is available at http://spoken-tutorial.org/NMEICT-Intro	Spoken Tutorial Project is a part of the Talk to a Teacher project and is supported by the National Mission on Education through ICT, MHRD, Government of India. More information on this Mission is available at spoken HYPHEN tutorial DOT org SLASH NMEICT HYPHEN Intro
Slide 11About the contributor This tutorial has been contributed by TalentSprint www.talentsprint.com Thanks for joining	This tutorial has been contributed by TalentSprint. Thanks for joining.

Contributors and Content Editors

Chandrika, Sneha